Fixed issue with installing dependencies

[puneet29]

The dependencies need to be installed in superuser mode else it results in errors.

[coveralls]

Pull Request Test Coverage Report for Build 1189

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 76.333%

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Totals
Change from base Build 1188:	0.0%
Covered Lines:	1403
Relevant Lines:	1838

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💛 - Coveralls

[mzfr]

In my opinion, rather than changing the installation command to run with sudo we should add a command to build the virtual env and then run the installation command inside the venv without any sudo

[Parth1811]

@puneet29 I have already added a PR with a better version of README in #355, please have a look I have added your suggestion as well. Also, I agree with @mzfr that there should be a virtual environment for TANNER, I would try to push a PR for that soon.

[puneet29]

Yeah, I suggested for the virtual environment too @mzfr @Parth1811 Also, I will close this pr once yours is merged.

[afeena]

@puneet29 I've merged #355, please update your changes accordingly, thanks!

[puneet29]

@afeena I've updated the pull request as requested.